| Black soil is a kind of fertile cultivated soil, and mainly distributed in the east of Songnen Plain in Northeast China. The black soil zone is famous for the fertile soil, excellent climate conditions, diverse habitat and rather advanced agro-technology conditions, so it is one of the commodity grain foundations, and plays an important role in the country's food supply. However, with the change of global climate, the development of regional economy, the increase of the population and the expansion of metropolitans and rural residential area, the land in the black soil zone is over-reclaimed and used improperly, and therefore, the problems of ecological environment, such as soil erosion, land degradation, water resource shortage, farmland pollution and natural hazard, is appearing. This paper analyzes the reasons of these environmental problems, and then puts forward the countermeasures. |